<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>

<form action="/user/login" method="post">
  username: <input type="text" name="username"> <br>
  password: <input type="password" name="password"> <br>
  <button type="submit">login in</button>
</form>
</body>
</html>